Malicious PDF — malware analysis report

Static analysis result for SHA-256 777da98556422837…

MALICIOUS

PDF

48.4 KB Created: 2021-04-26 05:44:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e67bfef1365ac6eda7b5071aedc4fb42 SHA-1: e75deac5ae65cf025414efc6784ab0e27d870db4 SHA-256: 777da985564228376e61431cc5bd961ebf06e98d84df1eecdd3eede75aeec7a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising a 'free generator / game hack' for Roblox. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious workflow. The document's content and embedded links suggest an attempt to lure users to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9764

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/roblox-top3k-free-model-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/free-old-roblox-accounts-2021.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-vip-server-roblox-booga-booga.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/cheat-engine-roblox-phantom-forces.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-execute-hack-scripts-in-roblox.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-catalog-free-2021.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-pajama-pants-free-shipping.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/cheat-to-make-my-damage-higher-on-da-hood-roblox.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/battle-royale-hacks-jailbreak-roblox.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-jailbreak-cheat-table.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-easy-on-ipad.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004360.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4360 25996 bytes
SHA-256: 3d16507781fa89d92b39774e1c5413ba21ddefd4bb484f8bb4387d5eb1a498de
font_01_sfnt_off00007ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF6 11440 bytes
SHA-256: 154d59d1680f2d1e38ccb783d6997f344290d121007e51df331726de4128c12e
font_02_sfnt_off00009a17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A17 18840 bytes
SHA-256: 993d1c7942fc42526f74b365d2613e9d95567e7775138b3b9b4448ba3e0dac8e

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